You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@lucene.apache.org by "Cao Manh Dat (JIRA)" <ji...@apache.org> on 2016/10/03 08:36:20 UTC
[jira] [Commented] (SOLR-4164) Result Grouping fails if no hits
[ https://issues.apache.org/jira/browse/SOLR-4164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15541879#comment-15541879 ]
Cao Manh Dat commented on SOLR-4164:
------------------------------------
This problem can happen when we set group.limit = -1 in distributed case. This bug doesn't happen in non distributed mode because inside Grouping we have this check
{code}
int groupedDocsToCollect = getMax(groupOffset, docsPerGroup, maxDoc);
groupedDocsToCollect = Math.max(groupedDocsToCollect, 1);
{code}
But things will be much different in distributed case, so we should ask ourselves is group.limit = -1 is a valid value of group.limit in distributed mode?
> Result Grouping fails if no hits
> --------------------------------
>
> Key: SOLR-4164
> URL: https://issues.apache.org/jira/browse/SOLR-4164
> Project: Solr
> Issue Type: Bug
> Components: SearchComponents - other, SolrCloud
> Affects Versions: 4.0
> Reporter: Lance Norskog
> Assignee: Cao Manh Dat
>
> In SolrCloud, found a result grouping bug in the 4.0 release.
> A distributed result grouping request under SolrCloud got this result:
> {noformat}
> Dec 10, 2012 10:32:07 PM org.apache.solr.common.SolrException log
> SEVERE: null:java.lang.IllegalArgumentException: numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count
> at org.apache.lucene.search.TopFieldCollector.create(TopFieldCollector.java:1120)
> at org.apache.lucene.search.TopFieldCollector.create(TopFieldCollector.java:1069)
> at org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector.<init>(AbstractSecondPassGroupingCollector.java:75)
> at org.apache.lucene.search.grouping.term.TermSecondPassGroupingCollector.<init>(TermSecondPassGroupingCollector.java:49)
> at org.apache.solr.search.grouping.distributed.command.TopGroupsFieldCommand.create(TopGroupsFieldCommand.java:128)
> at org.apache.solr.search.grouping.CommandHandler.execute(CommandHandler.java:132)
> at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:339)
> at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:206)
> {noformat}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org